Low severity2.7NVD Advisory· Published Jul 14, 2026· Updated Jul 15, 2026
CVE-2026-52840
CVE-2026-52840
Description
Easy!Appointments is a self hosted appointment scheduler. In versions prior to 1.6.0, Caldav::connect_to_server at application/controllers/Caldav.php:60 hands the request's caldav_url to a Guzzle REPORT call without scheme or host validation. A logged-in backend user (admin, provider, or secretary) reaches loopback, RFC1918, and link-local hosts on the deployment's network. The Guzzle exception path returns the upstream status code plus ~120 bytes of response body in the JSON message field (Caldav.php:74-78), so the SSRF is semi-blind. Version 1.6.0 contains a patch.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
alextselegidis/easyappointmentsPackagist | <= 1.5.2 | — |
Affected products
1- Range: <1.6.0
Patches
Vulnerability mechanics
References
8- github.com/advisories/GHSA-pm5p-7w5h-jm5qghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-52840ghsaADVISORY
- github.com/alextselegidis/easyappointments/commit/2da2baed18ec32ad7916e507815709c8f010d510ghsaWEB
- github.com/alextselegidis/easyappointments/commit/4abb10545d83ac1a57d03f6502376ee67696ea7cghsaWEB
- github.com/alextselegidis/easyappointments/commit/6b34b78c47790dfd1dec27cf62926db51be276e9ghsaWEB
- github.com/alextselegidis/easyappointments/commit/6eb9336a91cfb276379506625e81f5bd9ed3a536nvdWEB
- github.com/alextselegidis/easyappointments/releases/tag/1.6.0ghsaWEB
- github.com/alextselegidis/easyappointments/security/advisories/GHSA-pm5p-7w5h-jm5qnvdWEB
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